Oval swing-out manhole DJ-RK-TWK

Hygienic stainless steel 304/316L oval manway tank manholes can enter the closed space such as tank and container and prevent contamination in the food process,pharmaceutical and bioengineering, and cosmetics industry.

Application:

Food grade tank manholes are specialized access openings designed for containers,storage tanks,reactors in the food ,beverage,pharmaceutical,and cosmetics industries.

1.Food & Beverage Industry

• Dairy, Milk storage tanks, fermenters (requires steam sterilization capability).  
• Beverages Syrup/blending tanks (acid-resistant gaskets needed).  
• Condiments, Soy sauce/vinegar fermentation tanks (gas-tight design).  

2.Pharmaceutical & Biotech  

• Bioreactors, purified water tanks (must meet ASME BPE sterile standards).  

3.Cosmetics & Chemicals

• Cosmetic ingredient tanks (PTFE seals for oil resistance).

Working princples:

1.Seal design

-Uses food-grade gaskets (silicone, EPDM, or Viton/FPM) to prevent contamination from dust, microbes, or external pollutants.  

2.Hygienic design
  - Smooth internal surface (Ra ≤ 0.8 μm, per GMP standards) to prevent material buildup and allow easy CIP (Clean-in-Place) or SIP (Sterilize-in-Place).  
  - Made of 304/316L stainless steel for corrosion resistance and food compatibility.  

3.Safety Features
  - Pressure balance valves prevent sudden pressure release when opening.  
  - Explosion-proof versions may include rupture discs for overpressure protection

Hygienic tank manway function:
1.Hygiene Maintenance
  - Prevents cross-contamination, ensuring compliance with food safety regulations (e.g., HACCP).  

2.Operational Access 
  - Allows personnel entry for cleaning, inspection, or maintenance (large tanks must follow OSHA confined space regulations).  

3.Material Handling
  - Serves as a temporary filling port, sampling point, or connection for piping/pumping systems.  

4.Safety Control
  - Includes sight glasses or venting ports to monitor tank conditions and prevent vacuum/pressure hazards. 

Specification:

Size: 300*400, 330*430, 430*530

Seal material: EPDM; FKM; Slicon; HNBR

Shell material: 304/1.4301; 316L/1.4404

Handwheel material: 304, handle、 hand wheel 

Operating temperature: -20℃~130℃

Working pressure: ≤0.5bar

Different oval manway type

1.Oval swing in manhole

2.Oval swing out manhole

3.Oval fastigiate swing out manhole